As elment is represented as 19 39X tell its number of elctrons neutrons and electronic configuration identify the element given its nuclide symbol
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a) Configuration of X(19)=2,8,8,1.
b) It belongs to fourth period and its valency is 1.
c) Basic oxide (X
2
O)
d) X
2
O+H
2
O→2XOH
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